My 67 tradewind has a plastic tube coming out the top of the battery compartment door frame and hanging in the compartment. There is a small vent opening on the outside skin above the door that the tube connects to. So I have a length of tube opening to the outside and hanging in the inside.
My only guess is that this used to be some kind of off-gassing vent for the battery. What the heck is this tube for? Does it have any modern value? Do any of you with 66 - 68 Airstreams have such a thing?